Glaucoma or “Kala Motia” is a group of eye diseases in which the pressure inside the eye (intraocular pressure/ IOP) rises gradually weakening the optic nerve. The optic nerve is the nerve responsible for vision thus once it is weakened it would lead to the gradual loss of vision and sometimes total blindness.The pressure in the eye is maintained by a fluid called aqueous humour. This fluid is produced inside the eye(these are not tears) and drains through fine channels. If these drainage channels are blocked or the eye produces too much of this fluid then the pressure of the eye rises.